Feeling uncomfortable after finding out my husband masturbates to porn

Yesterday, I found out my husband masturbated after seeing something on Instagram that turned him on. He said it was just a “quick release” and not a big deal, but I can’t stop thinking about it. It makes me feel really uncomfortable knowing he got aroused by random women online instead of being intimate with me.

This isn’t the first time. A few months ago, I caught him masturbating while watching a sexual scene in a movie when he thought I was asleep. He said he wanted to get intimate with me but didn’t want to wake me up.

Now I keep wondering if he does this often when I’m not around. I’m feeling hurt and insecure, and I’m not sure if I’m overreacting or if this is something I should really talk through with him.

How do I deal with this? Is this normal in relationships, or should I be concerned?